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                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                 2025 November 25   
      A night skyscape is shown over snowcapped mountains. On the left is the   
      band of the Milky Way Galaxy, while on the right is a bright comet with   
        two tails -- a white tail going up and trailing to the right and a   
      longer blue tail going up and trailing off to the left. Please see the   
                    explanation for more detailed information.   
      
                          Comet Lemmon and the Milky Way   
                Image Credit & Copyright: Lin Zixuan (Tsinghua U.)   
      
      Explanation: What did Comet Lemmon look like when it was at its best?   
      One example is pictured here, featuring three celestial spectacles all   
      at different distances. The closest spectacle is the snowcapped Meili   
      Mountains, part of the Himalayas in China. The middle marvel is Comet   
      Lemmon near its picturesque best early this month, showing not only a   
      white dust tail trailing off to the right but its blue solar   
      wind-distorted ion tail trailing off to the left. Far in the distance   
      on the left is the magnificent central plane of our Milky Way Galaxy,   
      featuring dark dust, red nebula, and including billions of Sun-like   
      stars. Comet C/2025 A6 (Lemmon) is already fading as it heads back into   
      the outer Solar System, while the Himalayan mountains will gradually   
      erode over the next billion years. The Milky Way Galaxy, though, will   
      live on -- forming new mountains and comets -- for many billions of   
      years into the future.   
      
                      Tomorrow's picture: huge ball of stars   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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